I saw the topic below, but having tried it I thought it might help. My performance is much smoother than it was before, so for myself this is worthwhile. For those of you that may be experiencing stutters or poor performance look at this link. I am using it and the sim is smooth as a baby's butt.
http://www.simforums.com/forums/forum_posts.asp?TID=29685
http://www.simforums.com/forums/forum_posts.asp?TID=29685